Dialing to the PSTN Isn’t Working…

The scenario: You are bringing up a new SBA. The Lync side is up and running just fine. You can home users on the SBA and basic functionality tests out. You then set up the gateway side of the SBA the same way you’ve done elsewhere. Yet, no matter what you do, you cannot complete a call. The Lync client gives you some stupid message about “call can’t be completed”. The Lync Logging tool doesn’t show anything useful.

At this point, you need to look at the logs on the gateway. Here is what an AudioCodes spits out at you as you try to make an outbound call:

That doesn’t mean anything to you. A couple of those words could prove to be useful. At least it sees your source and destination number. So then you spend a day or two going line-by-line over the config comparing it to both the AudioCodes manual and the other AudioCodes SBA that is working just fine.

Finally you give up and decide to get the telephony provider involved. Even though you see green lights in the interface and no errors, you think maybe you have the wrong line encoding or something.

Luckily, they reply within 30 minutes to your cry for help with this lovely response: